Answer:
b. maximum height: 5.6 ft
c. 0.3 sec to reach its maximum height
Step-by-step explanation:
y = -16x² + 10x + 4 ...(1)
d/dx: -32x + 10 = 0
x = 5/16 ≈ 0.3 ... plug in (1)
y = -16*(0.3)² + 10*0.3 + 4 = 5.56 ≈ 5.6
